Assembly - December 2008 - (Page 18) Assembly in Action Magnetic Angle Sensors and Encoders POSIROT POSITILT ® Magnetic Inclination Sensors ® POSIROT : • Range from 0° to 360° • Protection class up to IP69K • Shaft and hollow shaft POSITILT : • Range ±15° up to ±180° • Protection class up to IP69K ® ® Magnetostrictive Position Sensors POSICHRON ® • Range from 4 in. to 226 in. • Resolution in nite • Linearity up to 0.01% • Protection class up to IP69K • Outputs: Start-Stop 0 - 10V; 4 - 20mA; SSI; PROFIBUS; CANopen • Absolute, wear-free cooling packages. The hoist on Bridge 3 is used for transmission mating. The G-Force lifts feature smooth, precise, servo motion and are equipped with Gorbel’s “float mode” option, which allows operators to both move and steady a load using only minimal force throughout the system’s vertical range of travel. The result has been a dramatic increase in efficiency coupled with an equally dramatic decrease in installation times. “The [crane] system has cut down on our time to assemble the engine drastically. Before, it would take us one hour just to install the cooling package. Now it takes less than five minutes,” says Cummins Crosspoint operator Dorian Rice. Because Gorbel lubricates and seals the motor and gear train of every GForce at the factory, the systems never need to be lubricated and are virtually maintenance free. For more cranes and other lifting devices, call 800-821-0086 or visit www.gorbel.com. A cutaway view of the Clincher shows how a rotating, angled peen is used to cold form the fasteners holding the device together. Climbing Gear Goes Orbital Magnetic Scale Position Sensors POSIMAG ® • Range from 0 to 98 ft • Resolution up to 1 m • Protection class up to IP69K • Non-contact • Adhesive mounting, screw mounting • Metal housing • Reference pulse, end position signals T he Trango Co. (Boulder, CO) manufactures a complete line of rock- and mountain-climbing equipment, including ropes, carabiners, harnesses and ice axes. One of the company’s more complex products is its Cinch-model belay device, which is used Cable Extension Transducers WS ® • Range from 4 in to 197 ft • Linearity up to 0.01% • Protection class up to IP68 • Outputs: 0 - 10V; 4 - 20mA; encoder A, B, Z; SSI; PROFIBUS; CANopen etc. • Compact, robust • For instrumentation, automation, OEM www.asmsensors.com Tel. 1-888-ASM-USA-1 Climbing gear manufacturer Trango needed a “bomb-proof” fastening method of assembling its Clincher rappelling device. either for rappelling down a cliff face or for stopping another roped-in climber from being injured in the event of a fall. In addition to being lightweight, the small device has to be utterly reliable. The result of almost any kind of failure would likely be fatal. This, in turn, requires an utterly “bomb-proof” means of assembling the two plates that make up the body of the device as well as the locking mechanism through which the climbing rope passes when it is in use. To solve the problem, Trango lead design engineer, Seth Murray, contacted fastening and conveying equipment manufacturer Orbitform Group (Jackson, MI), which studied the device at its applications laboratory in Michigan. Orbitform recommended that Trango employ a solid stainless-steel rivet to attach the device’s locking hardware using a conical peen. It also recommended the company use a hollow rivet form rolled out over a set of washers with an altered eyelet peen to secure the body of the assembly. Ultimately, Trango not only accepted both recommendations, it also installed an Orbitform B500 pneumatic orbital riveting machine to execute actual assembly. Orbital forming, or riveting, is a method of cold forming in which an angled peen is pressed against the rivet via a rapidly rotating spindle. A robust and precise process, orbital forming can be used to crown, flare, swage, peen, roll, curl, broach, seal, retain or crimp material. The resulting joint may or may not allow rotation of the mated parts, depending on the product design. Typical solid rivet sizes range from 0.02 inch to 3 inches in 18 ASSEMBLY / December 2008 www.assemblymag.com http://www.asmsensors.com http://www.gorbel.com http://www.asmsensors.com http://www.assemblymag.com
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